Cite

Spearfish Canyon on the B. & M. R. R

MLA

Locke, H. R. Spearfish Canyon on the B. & M. R. R. 1895. https://collections.library.yale.edu/catalog/2011960.

APA, 6th edition

Locke, H. R. (1895). Spearfish Canyon on the B. & M. R. R [Card photographs, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2011960.